A schedule is a set of events happening at certain time, right? They have to happen at that time since there is a contractual agreement on them happening at that time, and if they don't happen at that previously-agreed-upon time, then there will be negative consequences. That's exactly what a deadline is.
My schedule for today says that I am to meet a certain customer today at 3pm. We have a contract with them that stipulates this. In order to be there at 3pm I need to get the train at 2:10pm and for that I need to be done showering latest at 2pm. I can't make it otherwise. 2pm is a deadline for me. Bad things will happen if I don't make it. I can't justsay, oh well, quality just wasn't enough. I had enough time to plan ahead and be in the shower on time.
A schedule is a set of events happening at certain time, right? They have to happen at that time since there is a contractual agreement on them happening at that time, and if they don't happen at that previously-agreed-upon time, then there will be negative consequences. That's exactly what a deadline is.
My schedule for today says that I am to meet a certain customer today at 3pm. We have a contract with them that stipulates this. In order to be there at 3pm I need to get the train at 2:10pm and for that I need to be done showering latest at 2pm. I can't make it otherwise. 2pm is a deadline for me. Bad things will happen if I don't make it. I can't justsay, oh well, quality just wasn't enough. I had enough time to plan ahead and be in the shower on time.